With this convenient distribution box with a standard pin cable you can connect up to 4 grounding products with a grounded wall socket or a grounded extension cord in a grounded wall socket. Each DISTRIBUTION BOX and controller must be grounded. 26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used. This position is the connection point of the grounding wire in the. Whether you're a seasoned pro or just starting out, this comprehensive guide will give you practical insights into proper grounding techniques, with a special focus on how selecting quality materials from a reliable building material supplier impacts your entire system's safety and longevity. Grounding is a mechanism to protect distribution equipment and people under normal operating conditions, abnormal operational (overcurrent and overvoltage) responses, and hazardous conditions such as shocks. Grounding is necessary to assure correct operation of electrical devices, to assure safety. How to make proper & safe electrical ground wiring connections in the box: This article describes options for connecting a metal electrical box to the grounding conductor & connecting the grounding conductor to a fixture such as a ceiling light or ceiling fan.